Folding machine



Sept. 23, 1930; J. E. M IN T IRE FOLDING MACHINE Filed June 5, 1925 3Sheets-Sheet l Sept. 23, 1930. J. E. MCINTIRE 1,776,389

FOLDING MACHINE Filed June 5, 1925 3 Sheets-Sheet 2 Sept. 23, 1930. J,Mc lNTlRE 1,776,389

FOLDING MACHINE Filed June 5, 1925 3 Sheets$heet 3 wen 4558* 7 PatentedSept. 23, 1930 JAMES E. Mommies; or rnanonv, MASSACHUSETTS; nssrenon TUNITED SHOE MA- CHINERY CORPOILS'IION', 0F PATEBSQN, NEW JERSEY, ACORPORATION OF NEW H .lApplic ationifiled June '5,

a This invention relates to folding machines and is herein illustratedas embodied in a 'yond the edgesof the backing; and then to apply?"paste to these marginsv and fold them r over upon the adj acentmarginsof the back ing. The corners of'covers of the kindre .ferred to arecommonly of two types,

' rounded and square theppresent invention being concerned moreparticularly vwith the folding of covers the corners of which arerounded. Such cornerssshould be evenly plaited so'that thefolded-overmargin may be as fiat as possible and the folded edge haveasmoothcontour. l I

- In order to ensure such even plaiting there are provided,aecor'ding'to one feature of the invention, a vwork upport, a formingblock and a folder; the tw'olast-narned 'elements being adapted in theillustrated ma chine to move in a path which is substantially paralleltolthe surface of the work support and, to grip between theinthesmall Ie -reniy puck-ere which formed 'WllBIl the folder gathers the marg1nofthe work about the block, and thus to prevent the puckers from becomingdisplaced and thereby resulting in uneven plaits in the finished work Inthe illustrated machine, the work isplaced upon the work support and themargin at a corner thereofbent up 'wardly, said upstanding marginly1ng,be-

" tween the block and the folder." The folder then moves over the worksupport and in so doing first gathers the corner of the cover I aboutthe rounded face oft-he block thereby forming small, evenly spacedpuckers in said margin and pressing the puckered mar- Tl FOLDING MACHINE1925. Serial no. 35,1i1.

gin'against the bloclr. Thereafter, as the folder continues itsmovement-to fold the margin over the body portion of'fthe cover,

movementin the same direction as the folder, is pushed along by thefolder and continues to exert pressure allth'etime'upon the puckeredmargin so as 'toprevent' the puckers frombecoming displaced andun even.With this construction and mode'of operation the smallyevenly spacedpucker's are converted into small, evenly Spaced laits so thatthe"foldedover margin is as at as possible and the folded edge has a smoothcontour. i a I 'f The round cornered boards or backings used varygreatly in stiffness. When such board is made of cardboard or otherstiff material, it is possibleto fold the margin of the cover directlyover, the edge of the board; but, when the board is thin and weak, it isdifficult to make asatisfacto'ry' fold in this manner. According,therefore; to another feature of the invention, aformer, which may be athin suitably shaped plate, is iprovided over which the margin of thecover imay'befolded. to define the line of fold the a forming blockbeing: mounted for sliding movement in; a path substantially paralleltothe surface of the forming plate.

These and other features of the invention will be described as embodiedin an illustra tive machine and poin'ted outin" the appended claims. I eReferring now tothe accompanying draw ings,1- a r a Figure 1 is aperspective of'a machine. in which the present invention is embodied;and Figures 2 to 12 inclusive are perspectives of the work-engagingparts of the machine in various positions which they occupyduring theoperation of the machine, a piece of Work being shownin each instance inprocess of being operated upon.

, the block, which is yieldinglyinounted for Referring first to Figs. 2to 12, the illustrative machine is particularly adapted to the I foldingof the covers of book cases and similar articles having rounded corners,such work commonly comprising a backing-100 of cardboard paper or othersuitable material and acover 200 of flexible material which is commonlyleather, imitation leather or cloth, the cover beinglarger than thebacking so that itsmargin, projects beyond the edge of the backing; Acoating of paste is applied to this projecting margin, after which themargin is folded over and pressed down upon the margin ofthebacking'.Where rounded cornersiaredesired, the backing is cut with roundedcorners and the cover with similarly rounded corners or withpartiallyrcut odsquare corners and, when the corner of such a cover isfolded overthe corner of such a backmg,the corner of the cover should beand a straigd1tthe and a folder 15. The'cornerfoldgular table 17,;afolder 19, a forming plate 21,'in' the form of athin,generally-trianguflar plate, and a forming block 23. "lnzthe operationof the machine, the'corner of the work is pl'ace'd upon'the table 17withthe projecting margin ofthej cover extending over' an' edge guideand with'the work proper-1y l'ocate'd fby corner guides 27 which mayengage the straight edges of therback-i ing adjacent to the corner.These corner guides may be first raised to permit the mar gin of thecover to be thrust beneath them and thenallowedjto fall, so that thework may be 'properly located by causing the guides to engage thestraight edges of the backing adjacent to thecorner. The formingplate'21 is brought down by "a treadle to press thework firmly upon thet'able17 and thereby to "cause the projecting margin 7 of the/cover tobe bent upwardly, .and then acne-revolution clutch is rendered operatiVewith the follo r u "T f 19 moves forwardlto fold the upwardly bentmargin of the corner of the cover overthe edge of thefforming plate 21,the forming plate is withdrawn from beneath the'folded over margin ofthe cover,,andthe table 1'? rises to press the foldagainst the undersurface of the folder, "The parts then return to the positions shown.After the corners of I the 'coverhave been folded in succession, the Jstraight edges are presented in succession upon the table '13, and the.straight-edge The folder115 folds over the margin of the cover afterwhich the table 13 rises toypress the fold. As thus far described, themachine is substantially the same as that disclosed in application Ser.No. 729,930,,filed Aug. 4,

detail in connection. more particularly with Figures 2 to 12from whichthe corner guides 27 have been omittedto promote clearness.

Figures 2 and 3 show the work as it appears just after theforming plate21 has descended to cause the margin of the cover 200 to ffbei bentupwardly." Ihe two parts of thefolder 19 then swing toward each otheraboutthcir pivots 29' and simultaneously move forward to gather thecorner of the cover in small, evenly spaced puckers about the formingblock23, this gathering taking place progressively. In the positionofparts shown in Figures 4 and 5, the parts of the folder 19 have swungtowardeach other to anzex tent and moved forward sufficiently to causethe upstanding margin at the corner of the cover to approach fairlyclose to the reduced lower portion of the block: In the position ofparts shown in Figures 6 and '7, theparts of the folderhaveswungcompletely together I V and moved forward sufficiently togatherthe corner of themarginof the cover about and press it firmlyagainst'the' block. It should be notedt-hat the block 23 is normally10-;

cated near the rounded'forward end of the.

forming plateQl and has a convex'rounded surface-about whicha concavecomplemental recess in the folder19 gathers the upstanding marginofthecoverwhen{ the parts'reach; the positions shown inFigures 6 and"? toform the small, evenlyspaced puckers which have been referred to above.As the folder.

continues to move forward into its succes-' sive positions, one of whichis shown in Figures '8 and 9, the margin of the'fcover is folded overthe edge of the forming plate 21, theblock -23--being pushed to" theleft against the force'of a spring 31. During this folding of themarginover the edge of the forming plate the, margin is grippedyieldingly between the: block and thefolder so that'the.

puckered margin, which resulted from the movement of the folder into theposition shown in Figures 6 and 7, is drawnor dragged between theopposed gripping sur face'sof the forming block-and the folder. Afterthe folding of the margin of thecorner of the cover over theformingplate has been completed, the formingplate is with drawn frombeneath thGfOldBCl- OVB I margin as shown in Figures 10 and 11. Thetable17 then rises to press the fold againstthe under side of thefolder 19,the forming plate 21, and

with new block 23, is'raised to initialpo V I sition, and the machinecomes to rest with theparts inthe positions shownin Figure 2;

. '70 1924, in the nameof Glass and owned by the a I When the margin atthe corner of the cover is gathered about the block 23in the mannershown in Figuresfi. and.7,- puckers are formed, as has beenexplainedfwhich are sinall and substantially evenly spaced; andthesepuckers: are prevented fromabecoming disarrange'd during thefolding operation by reason of.

the fact that they are grippedbetween the block and the foldenduring thecompletion ofthe folding operation in theimanner which .has beendescribed. i I

It hasbeen stated above that smalleven'ly spacedpuckersare formed in themargin of the work when said margin is gathered about the :forming blockby thefolderr In the illustrated construction of forming block whichiisiparticularly adapted to leather coversitfwillrbe notedthat thisblock has'not only a rounded portion which facesthe-folder but: anupwardly and outwardly; flaring por- .tion. This upwardly and outwardly'flaring ,coyer is inade of soft and very flexible ma ter1al. such asleather.

portion is particularly desirable "when the Under these circumstancesthe outwardly flaringupper portion of-the forming block spreads theupper portion of the margin out somewhat so asto tend to prevent the.formation of puckers inthis portion at the stage illustratedin Fig. 7,the puckersbeing formed in-the locality engaged by: the folder andprogressively flattened by the". folder into{ plaits almost: immediatelyafter they are formed. It should also'be V noted that with a formingblock having this upwardly and outwardly flaring portion, the margin is.bent into a reverse curve-(see Fig. 7 )-s'o, that-it is gripped morestrongly than would otherwise; be thecase between the cam 115 '(seeFig.1).

."zgbl'o'ck from 'chattering in its cam track, the rod-'37 .is urged tothe left by coiled spring,

folder and the formingblock and is conse-- tlgwjhich bears at one endagainst theend of the sleeve ,and at the other end-against a collar-43which is adjustably fastened; set screw to the rod.

v g ,The forming block 23 is fastened 'to a small rod 45 which isslidably mounted in the stem '38, and said block has aflat under sidewhich rests upon the flatupperface of form ing plate 21. iThe block'QBisadjustably as tened to the rod 45 by a set screw fl. said rodwbeingurged continuallyto. the right by the tension spring 31 which isfastened: at one1endto an eyebolt 51 in the steinj-33 .andattheother endto small bracket 53 -ad-justably held in place on the rod 45 by clampingnuts 55 so that the tension ofthe spring may bev varied. TheeXtent-towhich the rod .45-is (permitted to move to the rightis limitedby a stop57' in the form of a .collarj threadedupon the rod and adapted tocontact withthe stem '33. The right-hand end of the rod 45, which isturned down somewhat,isiadapted to contact,- when the folder IQhaslrnoVed li'orward'to aboutthe position- Shownjin Figures 6 and 7, withanabutment in' the from of a hardened block 59 fastened by ascrew 61 tothe slide member 63 to which the members of the folder 19 are pivoted.The force' withlwhich the margin of the coveris pressed against theblock 23 during" 'thedoldmg operation thus depends upon the p'ositionoccupied by the block 23 on the rod :45, provisionbeing thus made thatthicker orthinner materialsmay receive the saineor different pressuresas may be desired.

Y Any suitablemeehanisms may be employed for imparting to the cornerguides 27, the former 21, the tWO part folder l9and the table 17 themovements which have been de scribed above. The particular mechanismsshown in the illustrative machine are the same as thoseof applicationSer. no. 729,930, which has been referredto above," the details of-theirconstructions forming no part of the 2 TllQSGIIlGCllfiIllSIHS will,

present invention. therefore,"befdescribe'd"very briefly in a generalway. f v

The corner guides '27 are normally in their lowered position, as shownin Figure 1, They ni'ust' be raised slightly topermit theniargin at thecorner 'of'a cover to be presented ben'eath theiinthen allowed todescend into lowered operative position so as" to engage the edgesofithe backing 100 adyac'ent to the corner thereof so that-the work maybe properly positioned, thenraised and held raised during thefoldingoperation, and finally permitted to descend to the position shown. Thesecorner .guides 27 are carried at the jouterends of arms 65 having acommon hub whicli is fast to a rock-shaft 67. The rocksha ft has'i'astto it two arms'GQ, 71 carrying rollers attheir outer ends.Cooperating with the roller on the arm 69 is tothe frame atT3aiid'having pivoted to its rear theupper end of a link 75,the lowerend ofwhich has a pivotal connection with an arm 77," sa d-arm beingpivoted to the irame at 7 9 and having pivoted to it near its middleportion-the upper end of a treadle rod 81. The lower end of this treadlerod is attached to the toe end of a heel-and-toe trea'dle, not shown,the heel end of the treadle being attached to'jthe lower end of atreadle rod'83, which, as will presently be expiainec acts to pull theformer 21 down uponthe Work. :In the operation of the machine, the

r toelend of the heelrandetoe treadle ispushed part way, down soas toraise the corner guides a lever- 72, pivoted 27 slightly while theoperator is placing the corner portionof the'cover upon the table 17,and isthen'rel'ea'sed to permit the corner guides to-fall into operativeposition. The operatornow locates the work properly with the 'aidof thecorner guides. I-Ie-next'depresses the heel end of the treadle whereupon, 'as will presently" appear, the former 21 is brought down andlockedintheposition shown in Figure 2. He then pushes the I toe end,offthe treadle' all the way down and releases, it. Pushing the treadleall the way down throws in a 0ne-revolution clutch, not

shown, which causesthe shaft 85 to make one revolution and come to rest;This one revolution of the shaft through a master camland levers, notshown,causestthe'slide 63 which carries both the cornerlfolder-19andthestraight-edge folder 15 to move forward, to

time.

pause and then to return to the positions shown. As this slide movesforward, a beveled block 89 lifts thearm 71, andfwith it the cornerguides, holdsthem raised during'the folding and fold-pressing operationsand. finallyperrnits them to fall into the position shown in Figure'l.The tables'17 and 13, like the folders 15, 19, are operated in unisonfrom the master cam on the shaft 85 to press the folds and toreleasethem at the proper As has been stated, depressionof the heel I end ofthe treadle to cause a downward pull on the rod 83, pulls down the;former 21 to i press the work against the'table 17. This rod. is pivotedat its upper end to the m ddle portion of an arm 89 which is pivoted tothe frame at91, said arm having pivotally connected with its outer endthe lower end of a link 93, the upper end ofwhich is pivoted to theouter end of an arm 95 the hubof which is fast to onevof a pair ofalined rock-shafts, the v common axis of whiohisindicated at 97. Fastrespectively to these alined rock-shafts are hubs 99, 101 at the ends ofthe arms of a fork which is integral with the sleeve 39 in which, as hasbeen explained, is slidably mounted therod 37 to the outer end of whichthe stem or carrier 33 of the former 21 is fastened.v A spring-pressedplunger. 103,

mounted in aca'sing 105which is-integral with the arm 95, normally holdsthe parts in V the positions shown withthe former 2 1 and block 23raised above the table 17; and a catch, indicated as awhole by thenumeral 107, is adapted to hold the sleeve 39 and with p it the formerin lowered position during the folding operation, said catch beingtripped at the propertime by a roll at the upper end of '3 an arm 109,said arm being actuated by the samevmaster cam on theshaft 85 whichoperates the folders and the tables.

. The operation of the machine is briefly as follows:-The toe end of theheel-and-toe treadle, which'is attached front and rear respectively tothe treadle rods 81 and 83, is depressed enough to raise the cornerguides 27;

somewhat above the table 17 but notlenough .to start the one-revolutionshaft 85. Ajpiece of work, comprising a backing 100 and a. cover 200 tothe projecting marginrof which'a coat of cement has been applied, ispresentedbeneath the corner guides and'the toe end of thetreadlereleased tofpermit the corner guides to fall; The work is-nowmanipulated to cause the corner guides to contactwiththestraightedges-of'the backingadjac'ent to the corner. The heel endof the treadle is :depressed to pull down'the arm 95 and with it thesleeve I i 39 so as to-cause the forming plate 21 to press the workagainst the table. The arm 95 "is locked in its lowered position by thecatch 107 and the forming plate121 thus held down during the operationsillustrated in Figures 7 2 to '11. The toe end of the treadle is thendepressed to its'full'extent'and released. This imparts one revolutionto the shaft and. causes the following movements. The folder c I slide63 moves forward,las shownin Figures 1 to 11, and causes the two p'artsof-the folder 19 to move forward andto swing-about their pivots 29 byreason. of the fact thatthe upper ends of pins 111 carried by the tailsof the folder parts run 'insuitably vshapedgrooves formed in the underside of a cover plate 113 (Fig. 1). The cam track member 115.;(Fig. 1)in which runs ablock pivoted to therear end o-f'the rod, 37 whichcarries-the forming plate 21, isthen swung bodily forward to. T move theforming plate 21- outfrom beneath the folded over margin ofthe cover, asshown in-Figure 111 The catch 107 which holds'the forming plate carrier39fdown is tripped by the'arm 109, and thetable 17 raised to press thefold, as shownin Figure'12, and finally the parts return to their normalpositions as shown inFigure 1.

I The four corner portions ofthe work are I,

presented in succession to the corner folding mechanism, which has.beendescribed above, and then the four straight-edge portions of thework are presented to the'straight-edge foldlng mechanism comprising thetable 13 and folder 15 (Fig. 1). Although it is stated above that thecorners are folded first and then the straight edgesQthis order ofprocedure may be reversed, if desired, by folding the straight edgesfirst up to points spaced from the corners and then folding the corners.

Although the invention has been set forth as embodied" in a particularmachine, it

should be understood that the invention is not limited in the scopeofits application to "applications, Serial No. 656,557 filed Aug; 9, 1923,in the nameiof Glass," and Serial .No;

729,930 filed Aug. 4,1924, also in the name of Glass, bothlof these"applications being assigned to the same assignee as isthe presentapplication. a

. 'Havi gthus described my invention, what I-claim as new and desire to.secure by Letters Patent of theUnitedxStates is: V

1. 'A machine of the class described having,

in ."combination, a work support, a folder movable over the work supportin a direction substantially parallel-to the plane of said in the'samedirection; as the folder, and;

support, a cooperating'forming block, about and against-which the marginof the work is held by the folderfduring the folding operation, saidblock being mounted for'movement means operating-priofto the movement ofthe? folderv for holding: theblock stationary V in the path of movementofthefolder. 2.1:A machine of'thecla'ssdescribed having,

, infcombination, a' .work support; a folder movable overthe worksupportin a path substantially. parallel to: the -plane' of said .supcport a i cooperating forming block; mounted tially parallel tothe-plane,of thesurface of the support, a co-operating forming: block located insaid path ofmovementand mounted for; movement in a path whichextends inthe same direction as that of the folder,-and

means for causing themarginofthe work toybeyieldingly clampedbetween'the block and the folder during the folding operation.

' l- 4. FA machine of theclass described having,

in'ccombination, a work support, means for bending upwardlythe margin ofthe work a forming block; a folder andme'ahs for caus ing'the folder,and block to grip the l margin and to move in unison in the samedirection ,150

to fold "the margin overthe bodyportion: of

A r ,v Q1 Y 5. A machine of the class described having,

in combination, a support i for the work, means for bending up themargin of'the work :a' folder, means for moving the folder in a' path tofold the upturned 'margindown over. the; body portion of; the work, aforming block mounted for movement in the path of folding movement ofthe folder and yielding means tending'toresist movement of the block insaid path whereby the block and the folderare caused yieldingly to'gripthe margin of-the cover between them and to move together inthe samedirection over the body portionofithecover. v p I r 6; Amachine of theclass described having, a

in combination, a work support, a folder movable: over the support, aforming block, a member by which the forming block is carried saidmember being mounted for sliding movement toward and from the folder,and an abutment movable with the folder and adapted to contact with saidmember during the movement of the folder.

7. A lrnachine of the class described having, in combination, a worksupport, a folder movable over the support, a forming block located inthe path of movement of the folder, :1 carrier for the block mounted'foryielding movement, means for causing the folder to press the marginof-the work against the block during the folding operation, an abutmentmovable with the folder and arranged to contact'with the carrierofthe'block, and means whereby: the initial distance between the blockand the folder may handed to vary the force with which themargin work ispressed" against the block;

8. Apmachine'of theclass described hav ing, in combination, a Worksupport for the corner portion of a piece, of work, means for bendingupwardly the margin of the-work, a forming block having a convexlyrounded surface, aifolder havinga concave recess the outline ofWhich'corresponds approximately to, that of-the'rounded surface of theblock, and means for moving the folder'over the support to fold" the"upstanding margin over thebodv portion ofrthexwork, said folder actingto gather the margin abou H round edsurface of the block andto carry theblock withit in its movement, the relative positions of theblock andthefolder' remaining unchanged during the time that the folder and theblock are both moving. 3 y

9. A machine of the class described/having, in combination, a'support'for'the corner portion of a piece ofwork, meansfor bending upwardly themargin'of the work, aforming block having a convexly rounded surface,said block being-located abovethe support andmounted for vieldingmovement in a path substantially parallel to i the surface of thesupport,-a folder mounted for movement in the same path, said folderhaving in its opera tive edge a'concave recess, and means for causingthe block and folder to grip the upstanding margin and lay it'over intoa positionparallel to the plane of the work.

10.. A machine of the class described having, in combination, a supportfor the corner portion of a piece of work, means forbend ing'upwardlythe margin of the work, a forming blockhaving a convexly roundedsurface, said block being located above the support and mountedfor-yielding movementin a path substantially parallel to the surface ofthe support, a folder mounted for movement in the same path, said folderhaving invits operative edge a concavelrecess, means for causing of thei the'block and folder to grip thefupstanding margin'and lay it overinto a position'parallel to the plane of the work, and means forpressing the: fold between the work support andthe folder. I

:11. A machine of the class described having, in combination a supportfor apiece of work, aniedge guide, means for bending'upwardly the marginof the work at a corner I thereofagainst the edgeguide, a folder movableoverthe edge guide in apath substantiallyv parallel to the plane of thesupport, a forming block held in the path of folding movement of thefolder and mounted for yieldingmovement in the direction of saidmovement, means for causing the folder to move over the edge gage firstto gather the margin about the block and then tocause the block to movein unison with tl'iGfOlClQllQfiIld means for causingrelative movement orap-' proach between the supportand the folder to press the fold. c

12. A machine of the class described hav ing,in combination, a Worksupport,,a forming plate adapted to rest upon the worlnafolder, movableov'er'the forming plate-in a path substantially parallel tothe plane ofthe forming plate to fold themargin over the plate, and a formingblockadapted to be i moved by the folder in the same direction.

13. A machine'ofthe classdescribed having, in combination, a worksupport, a forming plate adapted-to rest :upon the work, a

folder movable over the plate in a path substantially parallel to theplane "of the plate to fold the margin overthe plate, aiforming' blockadapted to be movedby the folder in the same' direction,means forwithdrawing the: forming. plate from the fold, and means i for causingthe fold to be pressed between the worlrsupport and the folder. Y

14;. A machine ofthe class described having, in combination; a supportfor the corner portion ofa piece ofworlrcomprisin'ga bacl ing and acover the marginof whichprojects beyond the edge of the backing, an edgeguide over which the projecting margin extends when the Work ispresented to theima'chine, a forming plate havingv .a rounded corner,means forc'ausingrthe'plate to press the work against the support andthereby to bend the margin of the cover upwardly, a forming blocklocated near the roundedcorner of the plate, said block being mountedfor yieldingmovement in a path substantially parallel to the plane ofthe plate, a folder, and means for causing the folder'to press theupstanding margin'of thework against'the forming block and to move theblock in a substantially straight path over the plate.

15. A machine of the class described having, in combination, aworksupport, a forming plate,a carrier for the plate movable to- Ward:and from the work support, a folder movableduring the folding operationover the plate, and a forming' block slidablewith respect to the plateand located n 'the path of movement-ofthe folder. c

I 16, A machine of the class described having, incombination, aworksupport, a form-. ing plate, a member by which the plate s carried,"saidmemberbeing movable toward during the folding operation over' the plate,and a forming block slidably mounted in the formingplate carrier andlocated inthepath of movement ofthe folder. 1 i 17. A machine oftheclass described havingfin combination, a workfsupport,-.a formingvplate, a foldermovab'l'e overthe forming plate in ajpathsubstantially parallelto said plate,and a forming bloc'klocated in thepath 1 r I of mov ement ofthe folder, said" block being slidably'mounted and having a rounded portion facing'the folder and an upwardlyand outwardly-flaring portion.

inggin combination, a work support, a folder movable" overthe ':worksupport in'fa path j substantially 5 parallel t0 -th e'- surface of thesupport, and a forming block located in the path "of movement of the'folder andfalso movable pin: path 7 which is I substantially paralleltoth'e surface of the work support,

I said'block -having a rounded portionfacmg the folder and an upwardlyand outwardly ri r t -fl i I a 1 "195A; machine forfolding the margin ata and from thevvork support,a folder movable It: 18. jAmachineof theclass describiedhaw V the corner 'of the'lcove'r of a bookcase 'o verthe round corner of' a board 'the'reof having,

in cqmbinationya work support, a forming plate, a' folder movable overthe forming plate dilring the folding operation, and; a i

formingjbloclradapted'to" cooperate with the folder, said block having aflat under surface, adaptedfto rest upon the plate, and means formounting the block; for sliding move;

ment;

1 o.'A' amnaaaaiding the-marginat 4 p 91-10 the rounded corner of aboardthereof hav the corner of the cover of a book caseovring,'incombination, a support forthe work,

a folderl moivablejoverthe support," aform I f. f ving block betweenwhich and the folder the tion, a folder movable in a straight path "andhaving an operative face adapted'to engage the outer face of the'margin,a forming block having an operative face to engage the inner face of themargin at a locality opposite'to that engaged by-'the folder and alsomovable in a straight path, means for holding; the forming block with aportionof its operative face located in the path of movement of theoperative face of'thefolder, and means for causing the folder to bemoved until'its operative face is spaced a predetermined distanc efrom-the operative vface of the block and for thereafter causing theblock to be moved with the folder, the two operative faces beingmaintained in opposed. relation during the folding operation.

7 In testimony whereof I have signed my name to this specification.

JAMES MQVINTIRE.

